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61430401 = 1719238269
BaseRepresentation
bin1110101001010…
…1101010000001
311021120222200001
43222111222001
5111211233101
610032400001
71344102244
oct352255201
9137528601
1061430401
113174862a
12186a6001
13c95b066
14823125b
1555d6901
hex3a95a81

61430401 has 16 divisors (see below), whose sum is σ = 71452800. Its totient is φ = 52386048.

The previous prime is 61430353. The next prime is 61430417. The reversal of 61430401 is 10403416.

61430401 = T6398 + T6399 + T6400.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-61430401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61430441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3295 + ... + 11563.

It is an arithmetic number, because the mean of its divisors is an integer number (4465800).

Almost surely, 261430401 is an apocalyptic number.

61430401 is the 6400-th centered triangular number.

It is an amenable number.

61430401 is a deficient number, since it is larger than the sum of its proper divisors (10022399).

61430401 is a wasteful number, since it uses less digits than its factorization.

61430401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 61430401 is about 7837.7548443416. The cubic root of 61430401 is about 394.5733811961.

Adding to 61430401 its reverse (10403416), we get a palindrome (71833817).

The spelling of 61430401 in words is "sixty-one million, four hundred thirty thousand, four hundred one".

Divisors: 1 17 19 23 323 391 437 7429 8269 140573 157111 190187 2670887 3233179 3613553 61430401